Sorry if this has been covered before. Darn search function is down again!! My son has a YZ80 (2001) and if he keeps growing like he has been, the bike will soon be too small for him. We just bought this bike last year and it still runs quite well and is still enough power for him. Buying a new bike is not in the realm of possibility right now, so I'd like to keep this one as long as possible. I've read somewhere that there is a big wheel kit for this bike. Can anyone shed some light on this? If it is doable, what would need to be done/modified on the bike to make it work? Thanks in advance.